"""Serve isolated browser regression checks without the API, model or user data.

Run `python scripts/check_frontend.py`, then open http://127.0.0.1:8081.
Only a temporary copy of frontend assets is exposed. Ctrl+C stops the server.
"""
from functools import partial
from http.server import SimpleHTTPRequestHandler, ThreadingHTTPServer
from pathlib import Path
from tempfile import TemporaryDirectory
import json
import shutil

ROOT = Path(__file__).resolve().parents[1]


class Handler(SimpleHTTPRequestHandler):
    def do_GET(self):
        if self.path.startswith('/api/'):
            body = json.dumps({'model': 'test', 'items': []}).encode()
            self.send_response(200)
            self.send_header('Content-Type', 'application/json')
            self.end_headers()
            self.wfile.write(body)
        else:
            super().do_GET()


if __name__ == '__main__':
    with TemporaryDirectory(prefix='deep-agent-frontend-') as directory:
        shutil.copytree(ROOT / 'static', Path(directory) / 'static')
        shutil.copyfile(ROOT / 'tests/frontend_markdown.html', Path(directory) / 'index.html')
        server = ThreadingHTTPServer(('127.0.0.1', 8081), partial(Handler, directory=directory))
        print('Frontend checks: http://127.0.0.1:8081', flush=True)
        try:
            server.serve_forever()
        except KeyboardInterrupt:
            pass
        finally:
            server.server_close()